LONDON, UK  [Friday Nov.7.2003]  /WMQT.com/ -- If you can believe what you read on websites, the former collaborators on "Lady Marmalade" are at each other's throats: Christina Aguilera and Pink are on the outs, with both dis-inviting the other to each one's parties.

It happened in London, where stars were holding private parties: Aguilera's for her current tour, and Pink's for her new album. TeenHollywood.com reports that after being stiffed at the door at Christina's after-show party, Pink hightailed it to her own, leaving instructions that Aguilera was to be turned away.

No word if Christina actually tried to crash the party in pink.

Wanna own a piece of Christina Aguilera?

More on Christina Aguilera

Wanna own a piece of Pink?

More on Pink